有加熱澆注機 了解詳情
1.溝槽式有芯澆注機
如果铸造厂既需要非加热澆注機系统的灵活性,但又要求很好的控制铁水温度,我们能够提供一个可加热浇注包的解决方案。通过安装一个配有沟槽式有芯感应器的浇包,系统能够提供高达100KW的功率给浇注包内铁水,从而保持稳定的铁水温度。沟槽式有芯感应器的电效率可以高达90%。可加热澆注機配备后倾功能,更改铁水牌号时能快速容易地倒空铁水。有加熱澆注機根据需要可以采用中频电源或者工频电源供电。采用工频电源供电时甚至无需使用水冷系统,而可以使用风冷系统进一步简化了配置,降低了维护成本。
2.有芯气压保温澆注機
優點:
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采用氣壓控制,澆注液面高度始終保持一致,確保澆注流量穩定;
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可以配置中頻電源,功率無級可調;
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可以對鐵水進行升溫,及保溫操作,溫度可控,穩定;
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可以擁有較大的容量,可作爲熔煉爐即造型線之間的鐵水緩存;
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電效率可以高達90%。節能省電;
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適用于長期運行,生産相對單一品種的産品,效率高,能耗極低。
缺點:
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不能隨意倒空鐵水,爐子裏始終保留有鐵水,必須始終保證供電,更換鐵水牌號不易;
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溝槽式感應器位于澆注爐的底部或側後部,依靠感應器循環,加熱溝槽內的鐵水。爐體內部鐵水溫度不均勻,尤其是進出鐵水通道沒有受到直接加熱。如果爲了達到1400℃度澆注溫度的話,需要溝槽式感應器加熱鐵水到1500℃;
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感應器的熔溝要經常,定時清理;
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澆注爐兩側的進出鐵水通道是整個爐體鐵水溫度最低的地方,非常容易結渣,清渣任務非常重,工作量大;
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如果全部生産球鐵的話,每周需要停下多個班次進行清渣,維護;.
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不適合用于球鐵生産。
3.无芯气压保温澆注機
優點:
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专利的“苹果芯”设计(实用新型专利,专利号:ZL 2015 2 0917882.8),电气效率更高。根据炉型的大小,可以达到70%;
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采用氣壓控制,澆注液面高度始終保持一致,確保澆注流量穩定;
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配置中頻電源,功率無級可調;
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可以對鐵水進行升溫,及保溫操作,溫度可控;
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加熱線圈包圍整個熔池及進出鐵水通道,全部鐵水受到加熱,溫度均勻,爐內鐵水溫度和澆注鐵水溫度一致;
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可以擁有較大的容量,可作爲熔煉爐和造型線之間的鐵水緩存;
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可以完全倒空鐵水,更換鐵水牌號很方便。在應急情況下,允許斷電後冷爐重熔;長時間不用可以斷電停運;
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使用氮氣保護可以有效延緩球化衰退;
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整個熔池和進出鐵水通道都受到加熱,進出鐵水通道很少結渣。即使結渣也非常容易清理。清理爐渣時工作量大比溝槽式有芯氣壓保溫澆注爐要小,也容易的多。
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有效容量大,可以使用的有效鐵水量超過80%的爐體總容量;
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適用于長期連續運行,生産包括球鐵在內的各種牌號的産品。
缺點:
"Excuse me," Arthur ventured, huskily, "did you wish to speak to me?" "What!" Balmayne cried, "were you mad enough to----." seventeen Christmas presents? I'm a Socialist, please remember; And to close the procession came more soldiers. For that fog the seaplane was making at full speed. It was no wonder that Spain, feeling the serious effects of this state of things, should resist it; and when she did so, and exerted an unusual degree of vigilance, then the most terrible outcries were raised, and wonderful stories were circulated of Spanish cruelties to our people beyond the Atlantic. At this time the Opposition got hold of one of these, and made the House of Commons and the nation resound with it. It was, that one Captain Robert Jenkins, who had been master of a sloop trading from Jamaica, had been boarded and searched by a Coastguard, and treated in a most barbarous manner, though they could detect no proof of smuggling in his vessel. He said that the Spanish captain had cut off one of his ears, bidding him carry it to his king, and tell his Majesty that if he were present he would treat him in the same manner. This story was now seven years old, but it was not the less warmly received on that account. It excited the utmost horror, and Jenkins was ordered to appear at the bar of the House of Commons on the 16th of March, to give an account of the outrage himself; and it would appear that both he and other witnesses were examined the same day. Jenkins carried his ear about with him wrapped in cotton, to show to those to whom he related the fact, and the indignation was intense. He was asked by a member how he felt when he found himself in the hands of such barbarians, and he replied, "I recommended my soul to God, and my cause to my country." The worthy skipper had probably been crammed with this dramatic sentiment by some of his clever Parliamentary introducers; but its effect was all the same as if it had been a genuine and involuntary expression of his own mind. Researches made at the Admiralty in 1889 proved that he really had lost an ear. Nevertheless, the whole army was dead beat and in the most deplorable condition when they entered Carlisle on the morning of the 19th. As the enemy did not appear, they rested that day and the following night, when they set forward again, leaving a fresh garrison. Cumberland was soon up before the walls, and they fired vigorously at him; but he sent off to Whitehaven and brought up six eighteen-pounders, with which, to their dismay, he began to play on their crumbling walls on the 29th. Next morning they hung out a white flag, and offered to capitulate; but Cumberland would hear of no terms except their surrendering on condition that they should not be put to the sword. At three o'clock in the afternoon both town and castle were surrendered, the garrison being shut up in the cathedral, and a guard set upon them. On the 3rd of January the Duke of Cumberland left the command to General Hawley, and hastened back to London, being summoned to defend the southern coast from a menaced landing of the French. In pursuance of this plan of the campaign, Prideaux and Johnson arrived before the fort of Niagara in the middle of July, which they found very strong, and garrisoned by six hundred men. Prideaux was soon killed by the bursting of a shell, but Johnson continued the siege with great ability, having to invest the fort on one hand, whilst he was menaced on the other by a mixed body of French and Indians, one thousand seven hundred in number, who came to relieve the fort. The attack upon him commenced with a terrible war-whoop of the Indians, which, mingling with the roar of the great cataract near, made the most horrible din imaginable. But this did not disconcert the English and their savage allies, who received them with such steady courage, that in less than an hour they were put to the rout in sight of their own garrison, and pursued for five miles with dreadful slaughter. The garrison thereupon capitulated, remaining prisoners of war. There, however, Sir William Johnson's career stopped. From various causes, not foreseen, he was not able to advance beyond the Ontario to unite with Amherst. That general had fully succeeded in taking Ticonderoga and Crown Point, but he found the French so strongly posted on an island at the upper end of Lake Champlain, that he was compelled to stop and build[134] boats to enable his army to reach and dislodge them; and it was not till October that he was ready to proceed, when he was driven back repeatedly by tempests, and compelled to go into winter quarters. "Some of you find Lieut. Bowersox, and bring him here," said Capt. McGillicuddy, sitting up, and beginning to twist a handkerchief around his thigh, to form a tourniquet. "Lieutenant, you all right?" The old man mounted into the seat, gathered up the rope lines, and chirruped to the horse to start. He hitched forward cautiously a little farther, to where he could peer through the bushes, being exceedingly wary not to repeat his opponent's mistake, and set their tops in motion. A rock protruding through the ground in front of him made an opening through which he could see, and also afforded a rest for his musket. He looked sharply, and at length was rewarded by seeing the gun-barrel come out by the side of the barked willow, rested on a bare limb, and apparently aimed at the hill beyond. He took a long breath to steady his nerves, stretched out his legs to make himself more at ease, pushed his musket forward until he got exactly the right poise, aimed about nine inches below the level of his opponent's gun-barrel, and a little to the left, drew his bead down to a hair's nicety in the hind sight, and pulled the trigger just as the rebel sharpshooter did the same. Both muskets seemed to flash at the same moment. The rebel sprang up through the willows and fell forward on his face. There was a vague hint that he had seen the face somewhere, but he dismissed it, then settled himself, and, busy with his own thoughts, pressed his face against the window, and tried to recognize through the darkness the objects by which they were rushing. They were all deeply interesting to him, for they were part of Maria's home and surroundings. After awhile the man appeared temporarily tired of billing and cooing, and thought conversation with some one else would give variety to the trip. He opened their lunch-basket, took out something for himself and his companion to eat, nudged Shorty, and offered him a generous handful. Shorty promptly accepted, for he had the perennial hunger of convalescence, and his supper had been interrupted. It was their regiment—the 200th Ind.; it was made up of the same companies, with the great majority of the men the same, but it was very far from being the 200th Ind. which crossed the Ohio River in September, 1862. "I should say he had a mighty strong breath, Monty," Shorty interrupted. He liked to break in on Monty's heroics. "Excuse me from havin' a 12pounder breathin' around me." "Yes, but d?an't m?ake him angry—he might beat you." "I used to be in the fancy," said the minister, "but five years ago the Lord challenged me, and knocked me out in the first round." "We shall talk further," said Holgrave: "in the mean time, we must consult for your own safety. If your father was a villein of this barony, it is not likely that the old steward, or the new one—the fiend Calverley—should forget you; and——"
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